Reunited after 16 years! My Best Friend's Wedding co-stars Julia Roberts and Dermot Mulroney cuddled up at the premiere of their new film August: Osage County 

By Colette Fahy

PUBLISHED: 19:57 EST, 9 September 2013 | UPDATED: 03:00 EST, 10 September 2013

They last appeared on screen together in the 1997 hit movie My Best Friend’s Wedding.

And now 16 years later, Julia Roberts and Dermot Mulroney will grace the big screen alongside one another again, this time in August: Osage County.

The duo had a reunion on the red carpet at the Toronto International Film Festival (TIFF) premiere for the film on Monday, although their co-star Meryl Streep missed out due to illness. 

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Reunited: 16 years after working on My Best Friend's Wedding together, Julia and Dermot caught up at the premiere of their latest movie

However, Julia, 45, provided the glamour in an embroidered red Dolce & Gabbana mini dress complete with bell sleeves which she paired with nude peep toe shoes and a clutch bag.

Julia’s hair was pulled back in a simple upstyle and she flashed her trademark wide smile for fans and photographers.

Meanwhile, Dermot, sporting longer than usual hair, wore a dark suit with a purple shirt. 

Lady in red: Julia impressed in a red Dolce & Gabbana dress as she attended the TIFF premiere of her new movie August: Osage County

Looking lovely: Julia looked smashing in her red dress as she posed with Ewan McGregor and Chris Cooper

They looked happy to be reunited as they posed on the red carpet.

Co-star Juliette Lewis was glamorous in a striking pale gown as she attended the special screening of the movie, while Little Miss Sunshine’s Abigail Breslin looked all grown up in a bright corset dress and denim jacket.

The blonde actress plays the pot smoking daughter of Julia’s character in the movie. 

Ewan McGregor was handsome in a black suit and white shirt as he joined his co-stars for the movie premiere.

Warm welcome: Julia greeted the crowd at the film festival

Pretty woman: Julia radiated star power at the event

Stunning: Juliette Lewis wowed in a floor length pale dress as she walked the red carpet

All grown up: Abigail Breslin wore a brightly patterned corset dress and looked a world away from her Little Miss Sunshine character

Dapper: Ewan McGregor looked elegat in his dark suit

While Meryl couldn’t make it, a previously released trailer shows her and Julia going head to head in the film, which revolves around a dysfunctional family who gather together in Oklahoma after the suicide of family patriarch Beverly.

Julia plays Barbara Weston, daughter of  Violet, the cancer stricken sharp tongued family matriarch.

All together: The whole cast gathered on stage ahead of the screening at TIFF

Co-produced by George Clooney and Grant Heslov, the trailer features the actresses sparring, with one piece of dinner table footage especially dramatic. 

The drama is based on the Pulitzer-Prize winning play by Tracy Letts which made its Broadway debut in 2007.

New movie: Julia plays Barbara Weston, daughter of  Violet, the cancer stricken sharp tongued family matriarch in August: Osage County

Work and play: Although she had a movie premiere on Monday, Abigail made time to do some shopping earlier in the day